Rail fastening



- April 28, 1936. A F, MULLER 2,039,181

RAIL FASTENING Filed June 22, 1955 1. IllItIIIIIIIII/l Patented Apr. 28, 1936 UNITED STATES PATENT OFFICE Application June 22, 1935, Serial No. 27,968 In Germany December 8, 1933 4 Claims.

This invention relates to rail fastenings on an iron support having a rolled-on rib extending in the longitudinal direction for the engagement of the clip bolt and for supporting the free limb of the clip. The invention has for its object to provide a rail fastening which is generally applicable and which, in spite of its great adjustability and general applicability required not only in the straight parts of the track, but more particularly in front of points and crossings, is intended for enabling the rails to be held releasably and yet securely. As compared with the known kinds of fastenings, special attention has been paid to returning the manufacturing costs of the clips for wood and iron sleepers and for iron sleepers themselves. The new section can be entirely finished by rolling. The rail fastening can be applied at any part of the sleeper.

The invention consists in this that the fastening supports of the wood or concrete sleepers, in the case of iron sleepers the latter itself, are provided with a continuous rib of dovetail-like cross section which serves for the engagement of the fastening bolts which are thus capable of being slid along the entire length of the rib with a head of corresponding shape. This clamping rib has this advantage, as compared with the known sunk groove, that it cannot become clogged up or collect water. It is trapeziform or hookshaped or is of any other form suitable for holding clamps or bolts. For securing the fastening bolts together with the associated clips the surface of the sole plates or of the iron sleepers is crenelated over its entire width or only to the width of the ribs along its entire length. In these teeth engages the outer limb of the clip, in the supporting end of which are one or more projections of the width of the gap between the teeth.

The invention is illustrated by way of example in the accompanying drawing, in which:

Fig. l is a perspective view in section of an iron sleeper with a clamping rib according to the invention, partly broken away;

Fig. 2 is a cross section through the sleeper carrying a shoe for bridging the clamping rib at the bearing places of the rails and for supporting the rails;

Figs. 3 and 4 are cross section and plan views, respectively, showing a rail clamped on an iron sleeper by the means of the invention;

Figs. 5 and 6 are cross section and plan views, respectively, showing a rail supporting plate with clamping rib according to the invention, applied on a wooden sleeper.

The rib a with the crenelation b is produced in rolling the sleeper c. A lined shoe 1 serves as a support for the rail and for bridging the rib, Fig. 2. This shoe is a steel pressing with an insertion of compacted wood or the like. The rail d is clamped to the sleeper c by means of hook bolts 9 with clamping bows or clips h. The clips h are provided on one of their bearing sides with one or more similar projections (teeth) to lit the crenelation of the rib, which engage in the gaps of the crenelation of the clamping rib a, so that the clips h are held rigidly therein. When the bolts g are drawn tight, the clip h with the fastening bolts 9 and consequently the rail d cannot shift laterally. As the crenelation extends along the full length of the clamping rib a it is possible to secure the rails also anywhere along the whole length of the sleeper or of the supporting plates in the case of wood sleepers. The pitch of the teeth of the crenelation constitutes the unit dimension; small differences in the gauge may be compensated by packing pieces 2', as shown in Fig. 3. These packing pieces i also serve for compensating the inclinations at points and crossings. The clip it according to Figs. 3 and 4 bears against an incline of the packing piece 2' and thereby presses the rail against the supporting plate and the foot of the clip on the other side of the rail. For enabling the hook bolts to be hooked on to and unhooked from the clamping ribs at any time recesses 7c are provided in the rib at certain intervals, which recesses may be produced during the rolling operation.

The form of a supporting plate with clamping rib for a wooden sleeper is shown in Fig. 5 in cross-section and in Fig. 6 in plan view. The supporting plate I with clamping rib a and crenelation b is fixed to the sleeper with wood screws.

What I claim is:

1. In a rail fastening device, an iron support having 2. rolled rib thereon longitudinal of said support, said rib having undercut sides and a transverse crenelation extending along its top surface, arched clips for clamping the rails to the support, having a projection of the width of the gaps in the crenelation on the end of the outer limb and adapted to engage in the said gaps and having the inner limb adapted to hold down the rail on the support, and clamping bolts for holding down the clips and having a clawshaped head adapted to engage with the undercut sides of the rib.

2. Rail fasteningmeans as claimed in claim 1 and in which the rib has constricted places for enabling the bolt heads to be introduced and withdrawn.

3. Rail fastening means as claimed in claim 1, and comprising angle-shaped gauge adjusting members adapted to be interposed between the rail foot and the end of the inner limb of the clip.

4. Rail fastening means as claimed in claim 1 and comprising bridge members for bridging the rib at the places where the rail rests on it, the said bridge members consisting of pressed steel pieces having a filling of some other ma- 5 terial.

FRITZ MULLER. 

